Micrometer-gage.



PATENTED AUG. 18, 1908.

P. J. SBIDELMAN. MICROMBTER GAGE. APPLICATION FILED Dno.9,19o7.

JM Y. Z

No. 896,590. PATENTED AUG. 18, 1908. P. J. SEIDELMAN. MICROMETER GAGE. APPLICATION FILED Dm.9,19o7.

2 SHEETS-SHEET 2.

PHILIP tIOIIN SEIDELMAN, OF BATAVIA, ILLINOIS.

MICROME TE R- GAGE Specification of Letters Patent.

' Patented Aug. 18, 1908.

Application led December 9, 1907. Serial No. 405,671.

To all whom it may concern:

Be it known that I, PHILIP JOI-IN SEIDEL- MAN, a citizen of the United States, and a resident of Batavia, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Micrometer- Gages, of which the following is a full, clear, and exact specification.

My invention is concerned with a novel micrometer gage, which can be used both as an inside and an outside gage, and which may have a depth gage attached to it or extensions to increase its capacity for inside measurements, and is designed mainly to produce a gage of the class described which shall be simple in its construction, durable, and in which the parts can be adjusted to take up wear, and in general to produce a device of the class described which shall be superior to those at present used.

To illustrate my invention, I annex hereto two sheets of drawings, in which the same reference characters are used to designate identical parts in all the figures, of which,-

Figure 1 is a side elevation of one form of my gage, with the parts closed; Fig. 2 is a front elevation in the same position g Fig. 3 is a central vertical section with the parts extended, and with a depth gage attached thereto 5 Fig. 3a is a horizontal section on the line 3;* 3u of Fig. 3; Fig` 4 is a view of the parts which go to make up the gage mechanism proper, with the elements thereof in vertical section and separated to show more clearly their construction. Fig. 5 is a vertical section of the lower jaw; Fig. 6 is a view of a modified design, with most of the parts in vertical section, and showing the jaws separated slightly, and with an extension in place; Figs. 7 and 8 are a top plan view and a front elevation, respectively, of the same, Fig. 9 is a side elevation of a short extension rod; Fig. 10 is a similar view of a longer extension rod and Fig. 11 is a vertical section of still a longer extension rod.

My gage is made up of the two body portions 20 and 21, which, for convenience, I will designate the lower and upper jaw portions, respectively. The ends of these portions, which are used for the largest inside measurements within the capacity of the instrument without extensions, have their ends 22 and 23 hardened and rounded in cross section to conform to the curve of the smallest circle the interior diameter of which they are adapted to measure. In addition, the upper and lower jaw portions are provided with the surfaces 24 and 25, which are similarly hardened and have a corresponding curvature, and are used to measure the interior diameter of the intermediate sizes for which the gage is adapted` The surfaces 26 and 27 are similarly hardened and rounded, and, of course, are used for the smallest inside measurements of which the apparatus is capable. In addition to the three pairs of surfaces here shown, I may employ other surfaces, as the surfaces 28 and 29 of the larger size gage shown in Figs. 6 to 8. The lower jaw portion is provided with the two cylindrical recesses 30 and 31, into which are driven the enlarged ends 32 and 33 of the bearing pins 34 and 35, which extend through the hardened bushings 36 and 37 which are driven into the open ends of the parallel recesses 38 and 39 which are formed in the upper portion 21 for the purpose of receiving the pins 34 and 35.

The graduations for the tenths of an inch are formed on the sleeve 40, which is driven on sleeve 41, which is preferably integral with the member 20 and'split at the upper end, as shown at 42, and tapered, as shown at 43, so that when the nut 44 with the tapered interior is screwed into the threaded upper end of the sleeve 40, the nut formed by the threaded interior of the upper end of the sleeve 41 may be tightened on the screw 45 to take up any wear that may occur and insure the accuracy of the instrument being maintained. The screw 45 is preferably provided with the enlarged upper end along the flange 46, upon which the inwardly projecting shoulder 47 of the graduated thimble 48 rests, and is adjustably held in osition by the adjusting nut 49 having the nurled outer surface by which it is grasped when it is screwed upon the threaded upper end of the enlarged head of the screw to clamp the thimble into position so that the zero graduation will coincide exactly with the graduations on sleeve 40. The thimble 4S and screw 45 are preferably supported by the shouldered pin 50, which is driven into the hollow upper end ofthe screw and is journaled in the hardened bearing 51 driven into the upper j aw member 21 beneath the head 52 of the pin by which the pin is held in place. To oil this bearing, I thread an aperture 53 centrally located in the bearing surface 23 leading to the recess in which the bushing 51 is driven, and in this aperture I place the short screw 54, which is withdrawn when the bearing is to beoiled. The members 20 and 21 are, of course, provided with the bearing surfaces 55 and 56 for outside measurements.

The operation of the apparatus thus far described will be readily understood, and no further description upon this point is deemed necessary.

In connection with my invention, I may employ a detachable depth gage, as shown in Figs. 3 and 4, where a pin 57 is shown as having a threaded reduced upper end with a shoulder which can be screwed into the threaded interior of the screw 45, it passing througha recess 58 formed in the bottom of the member 20. When this depth gage is used, a base 59 is secured in place by means of a set screw 60 with its enlarged knurled portion extending through the transverse aperture 61 in the base, and having its' `threaded reduced end passed through a suitable aperture in the upper surface of the base 59 and screwed into the enlarged threaded portion of the recess 58. Of course, it will be understood that when the depth gage atn tachment is not in use, the aperture 58 may be closed by a screw similar to the screw 54.

I/Vhere it is desired to extend the length of the gage for use in inside measurements, I may employ the attachments shown in Figs.A 6, and 9 to 11. In this case, the lower jaw portion 20 is provided with the threaded recess 62, into which the reduced threaded end 63 of the aw member 64 may be screwed. This jaw member has the shoulder 65, so that it can be screwed accurately into place, and the lower end is tapered and split like the upper end of the sleeve 4]., except that it is` not interiorly threaded. The knurled lock nut 66 is employed, with the tapered, interior bearing-surface 67 to cooperate with the tapered lower end of the jaw member 64, and its interior is threaded to cooperate with the threaded exterior of said member 64.- The extension pins 68, the shortest one of which is shown in Fig. 6, have the shank adapted to extend into the jaw member 64, and the enlarged head 69, with the interposed shoulder 7() which fits snugly against the lower end of the jaw member 64 to accurately position the pin. In Fig. 9, I have shown a longer pin, and in Fig. 10 a still longer one, the lower end of which is provided with a jaw member and knurled lock nut similar to the jaw member and knurled lock nuts 64 and 66, already described, so that a pin can be in turn attached to this pin, so as to increase the extension as much as may be necessary. In Fig. 11, I have illustrated still another extension in which, on account of its length, the body portion is preferably made of a tube 7 O, of considerable diameter, with the top and bottom members threaded therein in a manner that will be readily apparent, and if a single tube is not of suflicient length, several of the tubes can be joined together by interposing the connecting nuts 7l, which have the two threaded ends and the intermediate flange by which they are manipulated.

The operation of the extensions will be readily understood, as it is simply necessary to connect as many to the gage as may be necessary to make out the desired maximum measurement.

While I have shown and described my invention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications, and that I do not desire to be limited in the interpretation of the following claims except as may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of the United States, is:

1. In a micrometer gage, the combination with the jaw member having the jaw, the

pair of separated guide rods, and the graduated sleeve with .the nut in the outer end thereof between the guide rods, all projecting therefrom, of the cooperating jaw member having' the aw, the parallel recesses to receive the guide rods, and the screw journaled therein cooperating with the nut and provided with the graduated vthimble surrounding and cooperating with the graduated sleeve, substantially as described.

2. In a micrometer gage, the combination with the jaw member having the jaw, the pair of separated hardened guide rods, and the graduated sleeve with the nut in the outer end thereofl between the guide rods, all projecting therefrom, of the cooperating aw member having the aw, the parallel recesses to receive the guide rods, the hardened bushing sleeves secured in the outer ends of said recesses, and the screw journaled therein cooperating with the nut and provided with the graduated thimble surrounding and cooperating with the graduated sleeve, substantially as described. y

3. In a micrometer gage, the combination with the jaw member having the jaw, the pair of separated guide rods, and the graduated sleeve having its inner end provided with the split nut and the exteriorly-threaded clamping ring screwed into the sleeve, of the cooperating jaw member having the jaw, the parallel recesses to receive the guide rods,

' and the screw journaled therein cooperating with the nut and provided with the graduated thimble surrounding and cooperating with the graduated sleeve, substantially as described.

4. In a micrometer gage, the combination with the jaw member having the jaw, the pair of separated guide rods, and the graduated sleeve with the nut in the outer end thereof between the guide rods, all projecting therefrom, of the cooperating jaw member having the jaw, the parallel recesses to receive the guide rods, the screw coperating with the nut and provided with the graduated thimble surrounding and coperating with the graduated sleeve, and a hardened bushing sleeve in which the screw is journaled secured in said second jaw member, substantially as described.

5. In a micrometer gage, the combination with the jaw member having the pair of separated guide rods, and the graduated sleeve with the nut in the outer end thereof between the guide rods, of the coperating aw member having the parallel recesses to receive the guide rods, and the screw journaled therein coperating with the nut and provided with the graduated thimble surrounding and cooperating with the graduated sleeve, the base piece secured to the first jaw member at right angles to the guide rods, and the depth gage rod secured to the free end of the screw and passing through an aperture in the base piece.

6. In a micrometer gage, the combination with the jaw member having the pair of separated guide rods and the graduated sleeve with the nut in the outer end thereof between the guide rods, of the coperating jaw member having the parallel recesses to receive the guide rods, and the screw ournaled therein coperating with the nut and provided with the graduated thimble surrounding and cooperating with the graduated sleeve, the detachable base piece secured to the first jaw member at right angles to the guide rods, and the depth gage rod secured to the free end of the screw and passing through an aperture in the base piece.

7. In a micrometer gage, the combination with the jaw member having the jaw, the pair of separated guide rods, and the graduated sleeve with the nut in the outer end thereof between the guide rods, all projecting therefrom, of the coperating jaw member having the jaw, the parallel recesses to receive the guide rods, and the screw j ournaled therein coperating with the nut and provided with the graduated thimble surrounding and coperating with the graduated sleeve, the detachable base piece secured t'o the first jaw member at right angles to the guide rods, andthe detachable depth gage rod secured to the free end of the screw and passing through an aperture in the base piece.

8. In a micrometer gage, the combination with the jaw member having the bearing surface, the pair of separated guide rods, and the graduated sleeve with the nut in the outer end thereof between the guide rods, of the coperating jaw member having the bearing surface, the parallel recesses to receive the guide rods, and the screw journaled therein coperating with the nut and provided with the graduated thimble surrounding and coperating with the graduated sleeve, and the extension rod detachably secured to the first-mentioned aw-member, substantially as described.

9. In a micrometer gage, the combination with the aw member having the bearing surface, the pair of separated guide rods, and the graduated sleeve with the nut in the outer end thereof between the guide rods, of the coperating jaw member having the bearing surface, the parallel recesses to receive the guide rods, and the screw journaled therein coperating with the nut and provided with the graduated thimble surrounding and coperating withthe graduated sleeve, and the extension rod detachably secured to the first-mentioned aw-member, consisting of the shouldered pin together with the split clamping nut, and the knurled lock nut coperating therewith to secure the pin in place, substantially as described.

10. In a micrometer gage, the combination with the jaw member having the bearing surface, the pair of separated guide rods, and the graduated sleeve with the nut in the outer end thereof between the guide rods, of the coperating jaw member having the bearing surface, the parallel recesses to receive the guide rods, and the screw journaled therein coperating with the nut and provided with the graduated thimble surrounding and coperating with the graduated sleeve, and the extension rod detachably secured to the first-mentioned aw-member, consisting of. the shouldered pin, together with the split clamping nut, and the knurled lock nut coperating therewith to secure the pin in place, together with an intermediate clamping rod similarly provided with the clamping and locking mechanism at its outer end, substantially as described.

In witness whereof, I have hereunto set my hand and affixed my seal, this 27th day of November A. D. 1907.

PHILIP JOHN SEDELMAN.

Witnesses:

C. G. TANNER, J. W. WoLGAsT. 

